Organic Semiconductor Single Crystals for Electronics and Photonics

• Published in: Advanced materials (Weinheim) Vol. 30; no. 44; pp. e1801048 - n/a
• Main Authors: Zhang, Xiaotao, Dong, Huanli, Hu, Wenping
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 02-11-2018
• Subjects: Carrier mobility; Circuits; Current carriers; Diodes; emission; Fluorescence; Grain boundaries; Materials science; Optoelectronic devices; optoelectronic devices and circuits; Organic lasers; Organic light emitting diodes; Organic semiconductors; Photoluminescence; Photonics; Photovoltaic cells; Semiconductor devices; Semiconductors; Single crystals; Solar cells; Transistors; carrier mobility; organic semiconductors; emission; single crystals; optoelectronic devices and circuits
• ISSN: 0935-9648; 1521-4095
• DOI: 10.1002/adma.201801048

Organic semiconducting single crystals (OSSCs) are ideal candidates for the construction of high‐performance optoelectronic devices/circuits and a great platform for fundamental research due to their long‐range order, absence of grain boundaries, and extremely low defect density. Impressive improvements have recently been made in organic optoelectronics: the charge‐carrier mobility is now over 10 cm2 V−1 s−1 and the fluorescence efficiency reaches 90% for many OSSCs. Moreover, high mobility and strong emission can be integrated into a single OSSC, for example, showing a mobility of up to 34 cm2 V−1 s−1 and a photoluminescence yield of 41.2%. These achievements are attributed to the rational design and synthesis of organic semiconductors as well as improvements in preparation technology for crystals, which accelerate the application of OSSCs in devices and circuits, such as organic field‐effect transistors, organic photodetectors, organic photovoltaics, organic light‐emitting diodes, organic light‐emitting transistors, and even electrically pumped organic lasers. In this context, an overview of these fantastic advancements in terms of the fundamental insights into developing high‐performance organic semiconductors, efficient strategies for yielding desirable high‐quality OSSCs, and their applications in optoelectronic devices and circuits is presented. Finally, an overview of the development of OSSCs along with current challenges and future research directions is provided.
The long‐range order, no grain boundaries, low density defects, and high purity of organic semiconductor single crystals (OSSCs) make them excellent candidates for high‐performance optoelectronic devices/circuits. In this context, a systematic summary of the recent fantastic progress in the development of high‐mobility, emissive, and integrated optoelectronic OSSCs, as well as their technological devices/circuit applications is presented.